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Join Date: Jul 2005
Location: Rochester, New York
Re: BBC oil pressure sender
I too wanted the factory idiot light along with my mechanical pressure gauge, but I didn't want all that plumbing hanging off the block near the clutch z-bar.
I ran just the small copper line from the block thru the firewall to under the dash. (uses least plumbing on the block) Under the dash is where I installed a tee on the line and installed the oil light sending unit on the tee and then a copper line from the tee to the mechanical gauge. Problem solved.
The only downside was I had to run the blue oil sending light wire from outside of the firewall back thru the firewall so I could attach it to the oil sending unit now relocated to behind the dash. NBD.
I grew a 3d printed bracket to hold the tee to a dash support arm behind the dash, but you could just cable tie the tee down to a support as well.
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66 Malibu......back to life, now with a 427 BB & 4 speed